深层页岩储层转向压裂用暂堵材料研究及应用  

Research and application of deep shale reservoir diversionfracturing with temporary plugging materials

作　　者：陈挺 徐昊垠 张源 张磊[3] 于相东 李国良 CHEN Ting;XU Haoyin;ZHANG Yuan;ZHANG Lei;YU Xiangdong;LI Guoliang(Engineering Technology Research Institute,BHDC of CNPC,Tianjin 300280,China;Changning Joint Project Department of Development Department,Southwest Oil and Gas Field of CNPC,Chengdu Sichuan 610011,China;Downhole Technical Service Company,BHDC of CNPC,Tianjin 300280,China;Oil and Gas Cooperative Development Branch,BHDC of CNPC,Tianjin 300280,China)

机构地区：[1]中国石油渤海钻探工程有限公司工程技术研究院,天津300280 [2]中国石油西南油气田开发事业部长宁联合项目部,四川成都610011 [3]中国石油渤海钻探工程有限公司井下技服分公司,天津300280 [4]中国石油渤海钻探工程有限公司油气合作开发分公司,天津300280

出　　处：《石油化工应用》2024年第11期18-23,共6页Petrochemical Industry Application

基　　金：中油技服统筹项目“深层煤层气安全优快钻完井与高效压裂技术研究-课题4深层煤层气储层改造工艺及配套技术研究”(2024T-001-001)。

摘　　要：国内页岩气的开发逐步转向深层、超深层储层,对暂堵材料的耐温性能、耐压差性能提出了更高的要求。研发了一种耐高温、耐大压差、易降解的暂堵材料。实验结果表明:在聚丙烯酰胺分子链中引入刚性基团N-乙烯基吡咯烷酮(NVP)和多元丙烯酸酯,当摩尔比NVP∶DPHA∶AM=1∶1∶100时,产物具备良好的吸水膨胀性能和降解性能。耐温达到150℃,耐压差达到40 MPa,降解时间<8.5 h。现场试验结果表明,采取复合暂堵的方式能够提高施工压力3.5~5.6 MPa,提高了人工裂缝的复杂程度。The development of shale gas in China has gradually shifted to deep and ultra-deep reservoirs,which puts forward higher requirements for the temperature resistance and differential pressure resistance of temporary plugging materials.A kind of temporary plugging material which is resistant to high temperature, large pressure difference and easy degradation was developed. The experimental results showed that the rigid group N-vinylpyrrolidone(NVP) and polyacrylate are introduced into the polyacrylamide molecular chain, when the molar ratio of NVP∶DPHA∶AM=1∶1∶100, the product had good water absorption expansion and degradation properties. Temperature resistance was 150 ℃, differential pressure resistance was 40 MPa and the degradation time was less than 8.5 h. Field test results showed that the compound temporary plugging method can increase the construction pressure of 3.5~5.6 MPa and improve the complexity of artificial fracture.

关 键 词：深层 页岩储层 暂堵 耐温 耐压 可降解 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]